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  2. Quadrant (plane geometry) - Wikipedia

    en.wikipedia.org/wiki/Quadrant_(plane_geometry)

    The expression reads "All Science Teachers Crazy" and proceeding counterclockwise from the upper right quadrant, we see that "All" functions are positive in quadrant I, "Science" (for sine) is positive in quadrant II, "Teachers" (for tangent) is positive in quadrant III, and "Crazy" (for cosine) is positive in quadrant IV.

  3. Roman numerals - Wikipedia

    en.wikipedia.org/wiki/Roman_numerals

    iv = 4,000 XXV = 25,000 The vinculum came into use in the late Republic , [ 50 ] and it was a common alternative to the apostrophic ↀ during the Imperial era around the Roman world (M for '1000' was not in use until the Medieval period).

  4. Mathematical universe hypothesis - Wikipedia

    en.wikipedia.org/wiki/Mathematical_universe...

    The idea that math is 'out there' is incompatible with the idea that it consists of formal systems." Tegmark's response [10]: sec VI.A.1 is to offer a new hypothesis "that only Gödel-complete (fully decidable) mathematical structures have physical existence. This drastically shrinks the Level IV multiverse, essentially placing an upper limit ...

  5. Éléments de géométrie algébrique - Wikipedia

    en.wikipedia.org/wiki/Éléments_de_géométrie...

    In addition, the contents of Section 1 of Chapter IV of first edition was moved to Chapter I in the second edition. II Étude globale élémentaire de quelques classes de morphismes: Étude globale élémentaire de quelques classes de morphismes First edition complete, second edition did not appear. III Étude cohomologique des faisceaux cohérents

  6. 4 - Wikipedia

    en.wikipedia.org/wiki/4

    Two modern handwritten fours Sculpted date "1481" in the Convent church of Maria Steinach in Algund, South Tirol, Italy.The upward loop signifies the number 4. Brahmic numerals represented 1, 2, and 3 with as many lines. 4 was simplified by joining its four lines into a cross that looks like the modern plus sign.

  7. Jim Coykendall - Wikipedia

    en.wikipedia.org/wiki/Jim_Coykendall

    James Barker Coykendall IV is an American mathematician. Coykendall earned his bachelor's degree from the California Institute of Technology in 1989 and completed a doctorate at Cornell University in 1995. [1] [2] His thesis, titled Normsets and Rings of Algebraic Integers, was overseen by Shankar Sen.

  8. Implied volatility - Wikipedia

    en.wikipedia.org/wiki/Implied_volatility

    In financial mathematics, the implied volatility (IV) of an option contract is that value of the volatility of the underlying instrument which, ...

  9. Diode modelling - Wikipedia

    en.wikipedia.org/wiki/Diode_modelling

    The Shockley diode equation relates the diode current of a p-n junction diode to the diode voltage .This relationship is the diode I-V characteristic: = (), where is the saturation current or scale current of the diode (the magnitude of the current that flows for negative in excess of a few , typically 10 −12 A).